On 11/12/2020 6:19 PM, Timo Rothenpieler wrote:
Are you sure this is necessary at all? If apply_grain is 0, the value of those should be entirely irrelevant.
This is not about apply_grain == 0, but about apply_grain == 1 && update_grain == 0. In those cases, the parser only reads a frame index from the bitstream (film_grain_params_ref_idx), and you're supposed to get the FG values from said referenced frame.
As is, nvdec_av1 is filling all CUVIDAV1PICPARAMS FG fields except apply_grain and random_seed with zeroes on such frames.
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